Cisco MIBs: Not able to monitor chassis fans on a Cisco 4500X switch

NPM 11.0.1

SNMP community string to communicate with my devices.

Performed a MIB Walk on the switch.

I have the latest MIBs downloaded and installed on my SolarWinds server.

I have Hardware Health Monitoring checked on List Resources for the device.

I can see the 2-Power Modular Fan Units, but not the 5-Chassis Fans that are used for cooling the unit only.

I have successfully created an array of worthless Universal Device Pollers, but can't get the "5-Chassis Fans" to show at all...via a OID.  Again, I only see the 2-Power Modular Fan units and not the 5-Chassis fans under Hardware Health.

Switch: 4500X, IOS 03.04.02.SG151-2.SG2

Cisco's website is no help.

I see the Chassis Fan OIDs, but they fail when I hit the Test Button.

Any assistance in the matter would be greatly appreciated.

Thank you.